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prevent a panic when the netdev/ifp is not set in attach

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(internal  c63a7b85)

MFC after:	3 days
This commit is contained in:
Luigi Rizzo 2014-06-06 10:40:20 +00:00
parent 275b78396e
commit 441ab64f52
1 changed files with 2 additions and 1 deletions
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3
sys/dev/netmap/netmap.c
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@ -2260,7 +2260,8 @@ netmap_attach(struct netmap_adapter *arg)
fail:
D("fail, arg %p ifp %p na %p", arg, ifp, hwna);
netmap_detach(ifp);
if (ifp)
netmap_detach(ifp);
return (hwna ? EINVAL : ENOMEM);
}